Chemical fire-extinguishing apparatus.



E. L. THOMPSON, 1n CHEMICAL FIRE EXTINGUISHING APPARATUS.

APPLICATION FILED OCT-27.19%

Patented Nov. 28, 1916.

2 SHEE TSSHEET I.

III/A "51406 1 M30 1, W4 7 j 351 a/Hozu E. L. THOMPSONLJR CHEMICAL FIRE EXTINGUISHING APPARATUS.

APPLICATION FILED OCT 27. IBIS.

Patented Nov.. 28, 1916.

2 SHEETS-SHEET 2.

UNITE STATES, PATENT EVERETT L. THOMPSON, JR., 0]? DOVER, NEW JERSEY, ASSIGNOR.TO SYPHO-OHEMICAL SPRINKLER CORPORATION, OF CROTON-ON-HUDSON, NEW

OF NEW YORK.

Specification f-Letters Patent. l

YORK, A CORPORATION CHEMICAL FIRE-EXTINGUISHING APPARATUS.

Patented Nov. 28, 1-916.

Application filedOctober 27, 1915. Serial No. 58,096;

To all whom it may concern:

Be it known that I, EVERETT L. THOMP- soN', Jr., a citizen'of the United States, and

resident of Dover, Morris county, New J e'rsey, have madea certain new and useful 'Invention Relating to Chemical Fire-Extiny guishing Apparatus, of which the following.

is a specification, taken in connection with the accompanying drawing, part of the same. v

Thisinvention relates especially to chemi cal fire extinguishing apparatus in which a supplemental supply of extinguishing liquid is connected to the distributing system and comprises a chemical mixing tank and cooperating mixing devices which may be operatedthrough apressure reduction occurring in the distributing system under fire emergency conditions. The mixing devices comprise a suction chamber which may contain a charge of acid or pressure producing chemical that may be discharged into the mixing tank as-by an automatically starting siphon 'in the chamber. A cooperating primary chemical receiver containing a starting charge of liquid which may for instance be similar chemical has its starting siphon or other transferring device arranged to discharge into the suction siphon may break the suction in the cham-v her and a predetermined charge of acid or other pressure producing chemical is automatically discharged into the mixing tank,

without the necessary action of any rigid moving parts, thus insuring thfeaction of a definite amount of this pressure producing chemical in the mixing" tank and securing the development of the desired emergency pressure which is especially desirable where chemical means are used to subsequently which forms developed in the tank. In the accompanying drawings showing maintain the initial emergency pressure thus in a somewhat diagrammatic way illustrative embodiments of the invention, Figure 1 is a sectional elevation illustrating anembodiment of this invention; and Fig.v 2 is a similar view showing another arrangement.

The distributing:systemmay be of any i suitable type and constructionandmay comprise asupply pipe or riser'l-andconnected distributing lines 2 supplying any desired distributing devices such as theautomatic sprinkler heads 3 arranged at various points around the building to be protected. Any

suitable extinguishing liquid 6 may if desired be normally contained in the distribut ing system and may be supplied thereto under the desired moderate initial head or pressure as by the use of an elevated priming or actuating tank i, for instance, preferably extending the desired distance above the upper part of the distributing system and provided in some cases with a pin hole or other small vent 5'. A supplemental supply of extinguishing liquid is connected to the distributing system in any suitable way and may comprise the chemical mixing tank 8 containing, for instance, a charge of carbonate extinguishing liquid 9, the supply connection or lower extension of the supply pipe 1 in which is located the check valve 37 having if desired a suitable differential action, preferably extending into the mixing .tank adjacent the bottom thereof and being in some cases provided with a suitable strainer, such as 10, so that when the oooperating chemical mixing devices come into action'the desired emergency pressure of 50 to 100 pounds or so per square inch is developed through the chemical action taking place in the tank and thus causes the forcible discharge of liquid from the distributing devices in operation. w

The chemical mixing devices may if desired, comprise a suitable casing 21 mounted on the mixing. tank and communicating therewith through the opening 18, the casing 1 being normally tightly closed by a suitable cover 11. This casing may contain one or more cooperating charges of sulfuric acid or other pressure producing chemical adaptios ed to react with the liquidfin the mixing V 40 all'fbf'the char e 29 therefrom.

emergency ,con 'tions a suitable auction or tank and the suction siphon chamber ,34:

preferably containing a charge 25 of such acid or chemical in its bottom 31 which may be of reduced area to promote complete discharge therefrom, may be mounted in any desired way in the casing and have a closed top which may with advantage in some cases be provided with a pin-hole or other reduced area vent 33.

Any suitable discharge device may be arranged in connection with the siphon chamber, such, for instance, as the automatically discharging siphon indicated having. a discharge pipe 22, the lower end 19 of which communicates with the mixing tank, the

upper end 23 of this pipe being normally somewhat above thelevel of the charge 25 in the chamber and a siphon bell 20 being, if desired, arranged in connection with this 20 pipe so that the lower inlet end 24 of this siphon bell extends adjacent the reduced area bottom of the chamber so as to largely or substantially discharge the liquid therein When'this siphon comes into action.

5 A primary receiver or chamber 28 adapted to contain suitableliquid which if desired may be similar to the charge 25, may be suitably arranged within the casing at any suitable distance above the suction chamber and 3 may contain a starting charge 29 of acid or other chemical, any suitable cooperating transfer device such as the starting siphon 27 which is preferably of large area to quickly effect the discharge of this starting charge,-having a delivery end 26 extending if desired, within the suction siphon chamber while its receivingnend 30 extends down nearly toithe. reduced area bottom of the primaryreceiver so as to withdraw racti'cally nder fire pressure reduction is caused by any suitable means in the suction siphon chamber as by connecting therewith the suction actuating pipe or connection 7 which may communicate with any desired part of the distributing system where a suitable pressure reduction or .suction impulse is developed on "he fire emergency discharge of liquid from the system. Thus under such emergency conditions a corresponding suction or pressure reduction is produced in this suction siphon chamber which actuates the starting siphon so that it begins to deliver the starting charge into the suction siphon chamber. This suction impulse also tends with this illustrative form of the invention to suck material into the chamber through the automatically dis charging siphon therein so that the acid or other chemical is drawn down in the annular space within the siphon bell to an extent corresponding with the suction acting in the chamber; and the action of this discharge siphon is thus prevented or retarded so long as the suction is maintained in this tion occurs in the suction chamber gas can y be intermittently drawn into it from the tank without sufficiently breaking the sue-- tion within the suction chamber to allow dlscharge of acid therefrom.

The starting siphon may quickly deliver 5 substantially all the starting charge 29 into the suction siphon chamber, this action being promoted by the normal continuance of the suction within the chamber, and when this starting charge has been Withdrawn 3 from its primary receiver 28' so that the liquid level therein is below the bottom 30 of the receiving end of the starting siphon, the siphon will clear itself of liquid if the effective discharge head is made -suilicient g5 in relation to the area of its-inlet end, and

then the air within this receiver quickly passes through the siphon in sufiicient quantities to effectively break the suction within the suction siphon chamber 34 by substantially equalizing the pressure within the casing 21 inside and outside of this suction chamber. Thus the acid charge in the chamber which is then above the upper end 23 of the discharge pipe of the automatically discharging siphon quickly flows into this pipe and starts this siphon which continues to discharge this entire charge of acid or other pressure producing chemical into the tank to therein develop the desired e'mergency pressure through resulting chemicalaction. This insures the delivery of the desired amount of sulfuric acid or other pres-' sure generating chemical into the mixing tank since the pressure caused in the tank by the chemical action of the first part of this acid cannot stop or substantially interfere with the discharge of acid from the suction siphon chamber, and at the same time the starting siphon can act so quickly that no undesirable delay need occur'after the distributing system comes into action in the event of fire before the acid or other pressure producing chemical is discharged into the mixing tank.

'By properly proportioning the charges of sulfuric acid or other chemical in the primary receiver and suction siphon chamber the desired amount may be discharged into the mixing tank so as to generate the predetermined amount of pressure therein whlch is best suited for the particular system and distributing devices employed in any installation. If desired additional means may in some cases also be used to in- 125 sure the breaking of the suction within the" suction chamber 34 and for this purpose it is sometimes desirable especially where the effective head on the starting siphon issmallat the end of its discharge to employ Fig. 1 shows such an arrangement in which any suitable suction which may be in the form of a siphon shaped passage between the suction chamber and the starting receiver and having itsinlet end in the receiver located somewhat higher than the inlet end-of the startingsiphon. If desired, however; this vacuum break which may be in inverted U-tube form may extend sufficiently abovethe initial level of the starting charge 29 so'as not to act as a siphon and the suction break 53 has its inlet end 54: ar-

. ranged'within the starting charge but some distance above theinlet end 30 of the starting siphon 27. The lower end 55 of this suction break may as indicated extend within the suction chamber 34'so that when the starting siphon has acted to withdraw the starting charge from the receiver so that its level falls below the inlet end 54 of the suction break passage this device will operateto admit suflicient air to the suctlon chamber to break the-suction or pressure re- 'duction therein after sufiicient liquid in the shorter leg of this suction break flows out of the same so that the remaining liquid is thereupon carried up through this com municating passage leavmg an open airpassage therethrough. The suction isthus broken when a substantially predetermined amount of the starting charge has been transferred to the suction chamber, and the starting siphon under these conditions con-' tinues to discharge from" the receiver any liquid above the inlet end 30 of this siphon. The emergency pressure initially 'produced through this chemical action may be subsequently maintained by any desired devices, for example, .a supplemental chemical or acid chamber 12 being shown within the casing for this purpose and preferably provided with a pin-hole or small area vent 32 in its top. A charge 16 01 sulfuric acid or other pressure producing chemical may be placed in this chamber whichmaybe provided with an automatic pressure maintaining siphon ,or discharge dev ce whlch' may comprise the discharge pipe .13 com-- municating with the mixing tank-and having its upper end 15 somewhat above the normal level of the charge lfi in this sham her. The: siphon 'bell'l i which may 'ex-' tend around this discharge -.pi'p e within the chamber. may have its lower receiving end.

17 adjacent the reduced area bottom of the chamberso'as .to discharge substantially all of the acid or chemical therefrom. When the emergency pressure is developed in the i mixing tank as previously described this pressureacts through the discharge pipe .13 to forceadditio'nal air or gas into'the supplemental chamber 12 so that the upper part of this chamber which is preferably-of relatively large area a above the chemical charge therein is under substantially the full emergency pressure. When the continued. discharge from the system reduces this emergency premure in the tank the gaseous pressure inthis supplemental chamber forces therefrom a portion of the chemical charge which acts in the mixing tankto bring the pressure therein up to substantially the initial emergency pressure when this discharge automatically ceases until the mixing tank pressure again fallsfi Thus through suchintermittent discharges of acid or other pressure producing chemical from the supplemental chamber the desired emergency pressure can be substantially also sufiicient air-or other suitable gas under suflicient pressure t o' create enough pressure throughout the system to cause discharge of liquid fromthis priming actuating tank from-any openingdistributing device. The supplemental supply of extinguishing liquid 8 could in this case' be similarly: charged I with carbonate liquid 9 and a generally similar casing 41 may be mounted in .con-

i the cover 42 "so as tofco'ntain the chemical mlxlng'devices. These mixlng devices may in this instancecomprise a similar suction chamber 34 having an. automatically dis charging'siphon 19 to discharge the. sulfuric acid" or. other pressure. producing ch'emicalinto the mixing tank below. The cooperating primary receiver 37 mounted at any desired distance above the suction chamber may have a starting device or siphon 39 which may asindicated be of-t-he belltype and 'comprise'the siphon bell 56, the lower 1 'end57of which extends adjacent-the bottom 'of the reduced area sump or bottom portion ofthe recelver. In order to cause a suctlon impulse or pressure reduction within the suctionchamber 34 the suction actuating pipe-or connection 4:8 maybe carried from Y the air pressure actuating tank id -for instance/s0 that on the firefemergency dis charge' o f liquid from the distributing sys-.

.tema suflicient pressure reduction is caused in 'this tank so that when transmitted through' the actuating pipe the pressure in the. suction chamber 34 is correspondingly reduced and the resulting relativepressure reductlon or suctlon 1s sufficlent tooperate 1 the starting siphon 39 and discharge the pressure producing chemical or other liquid 1'00- nection therewith, and normally closed by.v

I siphon suction break, 59 may communicatev starting charge from the end 43 of this siphon communicating with the suction chamber. This suction impulse simultaneously prevents the action of the discharge siphon 19 until the predetermined amount of the starting charge has been transferred to the suction chamber, whereupon the suction therein is broken as by the starting siphon clearing itself so as to discharge into the mixing tank the amount of chemical in the suction chamber which is suflicient to flow out over the upper end 22 of the discharge siphon. If desired, however, a suitable siphon suction break passage, may be arranged between the suction chamber and a point in the primary receiver which is preferably somewhat above the inlet end of the starting siphon. As indicated this atits discharge end 58 with the suction chamberiand its inlet end 60 may be arranged slightly above the inlet end 57 of the starting siphon, this difference in level being somewhat exaggerated in for the sake of clearness.

Since the siphon suction break passage is at its upper end at about the same level with the starting siphon the suction impulse caused under emergency conditions in the suction chamber 34 tends to start both the siphon devices in operation so that the suction break may thus facilitate the transfer of the starting charge into the suction chamber below and constitute an additional means for this purpose so as to minimize the danger of failure in case the starting siphon fails to function properly. This relatively small area siphon passage naturally clears itself of liquid by a continuance of its siphon action after the liquid in the primary receiver has fallen below the inlet end 60 of this suction break and thereafter the suction break acts as an air passage freely admitting air to the suction chamber so as to break the suction therein and equalize the pressure in thecasing 41 both inside and outside the suction chamber 34. This'makes certain the starting of the discharge siphon 19 after a predetermined amount of the starting charge'has been transferred to the suction chamber, the starting siphon continuing its action so as to transfer substantially all of the remaining starting charge which is above its inlet end 57 so that a the drawing acid chamber 12 with an automatic pressure maintaining siphon discharge devices 13 similar to what has been previously described is indicated for this purpose.

This' invention has been described in connection with a number of illustrative em bodiments, forms, proportions, arrange:

ments and numbers of parts, to'the details of ing a chemical mixing tank and a cooperating casing containing chemical mixing devices to discharge pressure producing chemical into said mixing-tank, including a suction siphon chamber having a reduced area bottom containing a charge of pressure producing chemical, an automatically discharging siphon arranged in said chamber and having a discharge pipe delivering into said mixing tank, a primary chemical receiver containing a startingcharge of similar pressure producing chemical, a starting siphon cooperating with said receiver and having its discharge end communicating with said suction siphon chamber to discharge therein, a pneumatic suction actuating connection between the upper part of said distributing system and said suction siphon chamber to create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting si-' phon and simultaneously retard the action of said automatically discharging siphon' until said starting charge has been delivered into said chamber.

2. In chemical fire extinguishing apparatus, a distributing system normally charged with entinguishing liquid and comprising distributing devices, and a supplemental supply of extinguishing liquid connected to said system and comprising a chemical mixing tank and chemical mixing devices to dis charge pressure producing chemical into said mixing tank, including a suction siphon chamber having a reduced area bottom containing a charge of pressure producing chemical, an automatically discharging si phon arranged in said chamber and having a discharge pipe delivering into said mixing tank, a primary chemical receiver containing a starting charge of similar pressure producing chemical, a starting siphon cotiperating with said receiver and having its discharge end communicating with said suction siphon chamber to discharge therein, a pneumatic suction actuating connection between said distributing system and said suction siphon chamber to create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting siphon and simultaneously retard the action of said automatically discharging siphon until said starting charge .has been delivered into said chamber, and

prisin '=menta supply of extinguishing liquid conautomatic pressure maintaining means cooperating with said mixing tank to discharge chemical therein.

3. In chemical fire extinguishing apparatus, a distributing system' normally charged with extinguishing liquid and comdistributing devices, and a supple= ",iiected to said system and comprising a chemical mixing tank and a cooperating casing containing chemical mixing dev1ces to discharge pressure producing chemical into said xing tank, including a suction siphon chamber containing a charge of pressure producing chemical, an automatically discharging siphon arranged in said chamber and having a discharge pipe delivering into said mixing tank, a primary chemical re ceiver containing a starting charge of similar pressure producing chemical, a starting siphon coiiperating with said receiver and having its discharge end communicating with said suction siphon chamber to dis charge therein, a pneumatic suction actuating connection between the upper part of said distributing system and said suction siphon chamber to create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting siphon and simultaneously retard the action of said automatically discharging siphon until said starting charge has been delivered into said chamber.

4'. In chemical fire extinguishing appa- -ratus, a distributing system comprising automatic distributing devices, and a supplemental supply of extinguishing liquid con- "nected to said system and comprising a chemical mixing tank and cooperating chemicalmixing devices to discharge pressure producing chemical into said mixing tank including .a suction siphon chamber containing a charge of such chemical, an

automatically discharging siphon arranged in said chamber. and having a discharge pipe delivering into said mixing tank, a'primary receiver containing a starting charge, a large [area starting device'cooperating with said receiver and having its discharge end communicating with said suction siphon chamber to discharge therein, a pneumatic suction actuating connection between said dis-- l tributing system and said suction siphon chamber to create a suction in said chamber on the fire emergency discharge from said system and thereby actuate said starting device and simultaneously retard the action of said automatically discharging siphon until said starting charge has been delivered into cal into said tank without the use of rigid moving parts. i

'5. In chemical fire-extinguishing apparatus, r a distributing system normally charged with extinguishing liquid andcomprising distributing devices, and a supple mental supply of extinguishing liquid con-' said chamber to thereby quickly discharge a v substantially definite amount of such cheminected to said system and comprising a chemical mixing tank and cooperating. chemical mixing devices to dlscharge pres-- sure producing chemical into said mixing tank including va suction siphon chamber containing a charge of such chemical, an automatically discharging-siphon arranged in said chamber and having a discharge pipe delivering into said mixing tank, a primary chemical receiver containing a starting chargeof such chemical, a starting siphon cooperating with said receiver and having its discharge end communicating with said suction siphon chamber to discharge there in, a pneumatic suction actuating connection between'said distributing system and said suction siphon chamber to create a suction in said chamber on the fire emergency 'discharge of liquid from said system and thereby actuate said starting siphon and simul- Y taneously retard the action oi said automatically discharging siphon until said starting charge has been delivered into said chamber to thereby discharge a substantially definite amount of such chemical Without the use of rigid moving parts, and automatic pressure maintaining means cooperating withv said mixing tank.

6, In chemical fire extinguishing appa-v ratus, adistributing system comprisingdistributing devices, and a supplemental supply of extinguishing liquid connected to said' system and comprising a chemical mixing tank and coiiperating chemical mixing devices to discharge pressure producing chemical into said mixing tank includinga suction siphon chamber containing a charge of such a tion between said, distributingsystemaud.

said suction siphon chamber to create suc' tion in said chamber on the fire emergency discharge of liquid irom said' system and thereby actuate said starting siphon and simultaneously retard the action of said automatically discharging siphon until said starting charge has been delivered into. said 0 chemical mixing tank chamber to thereby discharge a substantially definite amount of such chemical withoutthe use of rigid moving parts and automatic pressure maintaining means cooperating with said mixing tank.

7. In chemical fire extinguishing apparatus, a vented distributing system comprising automatic distributing devices, and a supplemental supply of extinguishing liquid connected to said system and comprising a chemical mixing tank and chemical mixing devices to discharge pressure producing chemical into said mixing tank including a suction siphon chamber containing a charge of acid pressure producing chemical, an automatically discharging siphon device arranged in said chamber and having a discharge pipe delivering into said mixing tank, a primary chemical receiver containing a starting charge of such acid chemical, a large area starting siphon device cooperating with said receiver and having its discharge end communicating with said suction chamber to discharge therein, a pneumatic suction actuating connection connected to said suction chamber to automatically create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until a substantially definite amount of said starting charge has been delivered into said chamber, and automatic pressure maintaining means cooperating with said mixing tank.

8. In chemical fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprising distributing devices, and a supplemental supply of extinguishing liquid connected 'to said system and comprising a and cooperating chemical mixing devices to discharge pressure producing chemical into said mixing tank including a suction chamber containing a charge of such chemical, an automatically discharging siphon device arranged in said chamber and having a discharge pipe delivering into said mixing tank, a primary receiver containing a starting charge of such chemical liquid, a siphon starting device cooperating with said receiver and having its discharge end communicating with said suction chamber to discharge therein, a pneumatic suction actuating connection between the upper part of said distributing system and said suction chamber to create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until said starting charge has been delivered into said chamber to thereby discharge a substantially definite amount of such chemical without the use of rigid moving parts, and automatic pressure maintaining means cooperat ng withsupplemental supply of extinguishing liquid.

9. In chemical fire extinguishing apparatus, a distributing system comprising distributing devices, and a supplemental supply of extinguishing liquid connected to said system and comprising a chemical mixing tank and cooperating chemical mixing devices to discharge pressure producing chemical into said mixing tank including a suction chamber containing a charge of such chemical, an automatically discharging siphon device arranged in said chamber and having a discharge pipe delivering into said mixing tank, a primary receiver containing a starting charge of such chemical liquid, a siphon starting device cooperating with said receiver and having its discharge end communicating with said suction chamber to discharge therein, a pneumatic suction actuating connection between said distributing system and said suction chamber to create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until said starting charge has been delivered into said chamber to thereby discharge a substantially definite'amount of such chemical without the use of rigid moving parts, and automatic pressure maintaining means cooperating with said supplemental supply of extinguishing liquid. i

10. In chemical fire extinguishing apparatus, a distributing system comprising dis- 4 tributing devices, and a supplemental supply of extinguishing liquid connected to said system and comprising a chemical mixing tank and cooperating chemical mixing devices to discharge pressure producing chemical into said mixing tank including a suction chamber containing a charge of such chemical, siphon device arranged in said chamberv and having a discharge pipe delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting device cooperating with said receiver and having its discharge end communicating with said suction chamber to discharge therein, a suction actuating connection between said distributing system and said suction chamber to create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until said starting charge has been delivered into said chamber to thereby disan automatically discharging charge a substantially definite amount of .tank and ing means coeperating with said supplemental supply of extinguishing liquid.

vices to discharge pressure producing chema discharge pipe delivering into said mixing ical into' said mixing tank including a suction chamber containing a-charge of such chemical, an automatically discharging device arranged in said chamber and having tank, a primary receiver containing a starting charge of-liquid, a starting dev ce cooperating with said receiver and having 1ts discharge end communicating with said suction chamber to discharge therein, a suction actuating connection between said dis tributing system and said suction chamber to create a suction'in said chamber on the fire emergency discharge of liquid vfrom said system and thereby actuate said starting device without the use of rigid moving parts, and automatic pressure maintaining means cooperating with said supplemental'supply of extinguishing. liquid.

12. In chemical fire extinguishing apparatus, a distributing system comprising distributing devices, and a supplemental supply of extinguishing liquid connected to said system and comprising a chemical mixing tank and chemical mixing devices to discharge pressure producing chemical into said mixing tank including a suction siphon chamber containing a charge of pressure producing chemical, an-automatically discharging siphon device arranged in said chamber and delivering into said mixing tank, a primary chemical receiver containing a starting charge of such chemical,- a starting siphon device cooperating with .said receiver and having its discharge end communicating with said suction chamber to discharge therein, a pneumatic suction actuating connection connected to said suction chamber to automatically create a suction in said chamber on the fire emergency discharge of liquid from said system and thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until, a substantially definite amount of said starting charge has been delivered intosaid chamber, and automatic pressure maintaining means cooperating with said mixing tank.

13. In chemical fire extinguishing apparatus, a distributing system comprising distributing devices, and a supplemental sup ply of extinguishing'liquid connected to said system and comprising a chemical mixing tank and chemical mixing devices to dis-.'

charge pressure producing chemical into said mixing tank including a suction siphon chamber containing'a charge of pressure producing chemical an' automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary chemical receiver containing a starting charge of such chemical, a starting siphon device cooperating with said receiver and having its discharge end communicating with said suction chamber to' discharge therein, ,a pneumatic suction actuating connection connected to said suction chamber to automatically create a suction in said chamber on the fire emergency discharge of. liquid from said system and thereby actuate said. starting device and simultaneously retard the action of said automatically discharging device until a substantially definite amount of said starting charge has'been delivered into said chamber.

14. In chemical fire extinguishing apparatus, a distributing system comprising distributing devices, and asupplemental supply of extinguishing liquid connected to said system and comprising a chemical mixing tank and chemical mixing devices to discharge pressure producing chemical into said mixing tank including a suction chamber containing a charge of pressure producing chemical, an automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary chemical receiver containing a starting charge of such chemical, a starting device cooperating with said receiver and having itsdischarge end communicating'with said suction chamber to discharge therein, a pneumatic suction actuating connection connected to said suction chamber to automatically create 'a' suction in said chamber on the fire emergency dischargeof liquid from said system and thereby actuate said starting device andtomatically discharging device'until a sub-- stantially definite amount of said starting charge has been delivered into said chamber.

charge pipe delivering into said mixing simultaneously retard the action of said a'utank, a primary chemical receiver containing; a starting charge of such chemical, a large area startmg siphon devlce cooperating with' said receiver and having its dischargeend communicating. with said chamber to dis charge therein, and means adapted to create I a suction in said chamber onlthe fire emergency discharge of liquid from the connected distributing system and thereby actuate said starting device and simultaneously retard the action of said automatically disa mixingtank, including a suction siphon chamber containing a charge of such chemical an automatically discharging siphon device arranged in said chamber and delivering into said mixing tank, a primary chemical receiver containing a starting charge of such chemical, a startmg siphon device co- ,operating with said receiver and having its discharge end communicating with said chamber vto discharge therein, and means adapted tocreate a suction in said chamber on the fire emergency discharge of liquid from theconnected distributing system and thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until said starting charge has been delivered into said chamber.

17. In chemical fire extinguishing apparatus, a chemical mixing device-adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an automatically discharging device arranged in said chamber and delivering into said 'mixin tank a rimar chemical receiver containinga starting charge of such chemical, a starting siphon device cooperating With said receiver and having its discharge end communicating with said chamber to discharge therein, and means adapted to create a suction in said chamber and-thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until said starting charge has been delivered into said chamber.

18. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a chamber containing a charge of such chemical, an automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary chemical receiver con- 'taining a starting charge of such chemical, a

starting device cooperating With said receiver and having its discharge end communicatingwith said chamber to discharge therein, and means adapted to actuate said the action of said automatically discharging I device until said starting charge has been delivered into said chamber.

19. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction siphon chamber containing a charge of such chemical, an automatically discharging siphon deoperating vice arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting siphon device cooperating with said receiver and having its discharge end communicating with said chamber to discharge therein, and means adapted to create a suction in said chamber on the fire emergency discharge of liquid from the connected distributing system and thereby actuate said starting device.

20. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting siphon device cooperating with said receiver and having its discharge end communicating With said chamber to discharge therein, and means adapted to create a suction in said chamber and thereby actuate said starting device and simultaneously retard the action of said automatically discharging device until a substantially definite amount of said starting charge has been delivered into said chamber.

21. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an au- 100 tomatically discharging device arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting device cooperating with said receiver and having its 105 discharge end communicating with said chamber to discharge therein,'and means adapted to create a suction in said chamber and thereby actuate said starting device.

22. In chemical fire extinguishing appa- 11o ratus, a chemical mixing device adapted-to discharge pressure producing chemical into a mixing tank, including a chamber containing a charge of such chemical, an automati cally' discharging device arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting device covvith'said receiver and having its discharge end communicating with said chamber to discharge therein, and means adapted to actuate said starting device.

23. In chemical fire extinguish ng'apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an automatically discharging device arranged in said chamber and delivering into said mixmg tank, a primary receiver containing a ratus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an automaticall discharging device arranged in said cham er and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting device cooperating with said receiver and having its discharge end communicating with said chamber to discharge therein, and means adapted to create a suction in said chamber and thereby actuate said starting device, and automatic pressure maintaining means cooperating With said system.

25. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a chamber containing a charge of such chemical, an automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting device cooperating with said receiver and having its discharge end communicating With said chamber to discharge therein, means adapted to actuate said starting device, and automatic pressure maintaining means cooperating with said system.

'26. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting siphon device cooperating with said receiver and having its discharge end communicating with said chamber to; discharge therein, and means adapted to create a suction in said 'chamber and thereby actuatesaid starting device and-simultaneously retard the action of said automatically discharge device until asubstantially definite amount of said starting charge has been delivered into said chamber, a siphon shaped suction break passage'between said suction chamber and a point in said receiver above the inlet end of said starting siphon device, and autober containing a charge of such chemical,

an automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting 5 device cooperating with said receiver and having its discharge end communicating with said chamber to discharge therein, means adapted to create a suction in said chamber and thereby actuate said starting device, a siphon suction break passage between said suction chamber and a point in said receiver above the inlet end of said starting device, and automatic pressure maintaining means cooperating with said system. Y

28. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an automatically discharging devlce arranged in.

said chamber and delivering into said mixing tank, a primary receiver containing a starting charge of liquid, a starting device cooperating with said receiver and having its discharge end communicating with said chamber to discharge therein, means adapted to create a suction in said chamber and thereby actuate said starting device, a

suction break between said suction chamber I and said receiver, and automatic pressure maintaining means cooperating with said system. a

29. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a chamber containing a charge of such chemical, an automatically discharging device arranged in said chamber and delivering into said mixing tank, a primary receiver containing a starting charge'of liquid, a starting device 00- operating With said receiver and having its discharge end communicating with said chamber to discharge therein, means adapted to actuate said starting device, a siphon suction break passage between said suction chamber and a point in said receiver above the inlet end of said starting device, and automatic pressure maintaining means cooperating With said system.

30. In chemical fire extinguishing apparatus, a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a chamber containing a charge of such chemical, an automatlcally discharging device arranged in saldchamber and dellverlng into said mixing'tank, aprimary receiver containing a starting charge of li uid, a starting device cooperating with sai its discharge end communicating with said, chamber to discharge therein, means adaptreceiver and having v ed to actuate said starting device, a suction break between said suction chamber and said receiver,-and automatic ressure maintaining means cooperating'withsaid-system.

31. In che'mical fire extinguishing apparatus,-a chemical mixing device adapted to discharge pressure producing chemical into a mixing tank, including a suction chamber containing a charge of such chemical, an

automatically discharging device arranged I in said chamber and delivering into said mixing tank,-a primary receiver containing afstarting charge of liquid,- a starting siphon device/cooperating with said receiver and having its discharge end communicating with saidchamber to discharge therein-and a siphon suction break passage between said suctionachambe'r and a point in said receiver above the inlet end of said starting device. 32; Inchemical fire extinguishing apparatus, a chemical mixing device adapted to.

discharge pressure producing chemical into amixing tank, including a suction chamber containin a charge of such chemical, an automatical y discharging device arranged in 'said chamber and deliveringinto said mixing tank, a primary receiver containing a starting charge of liquid, a starting siphon device cooperating. with said receiver and having is discharge end communicating with chargingdevice until a substantially definite" amount of said starting charge has been delivered into said chamber.

taining a charge of such chemical, an automatically discharging device arranged in said chamber and deliveringinto said mixing tank, a primary chemical receiver containing a starting charge of such chemical, 'a starting device coiiperating with said receiver and having its discharge end communicating with said chamber to discharge therein, a siphon suction break passage between said suction chamber and a point in said receiver above the inlet end of said starting device, and means adapted to actuate said startingdevice and, simultaneously retard the action of said automatically discharging device until asubstantially predetermined amount of said starting charge has been delivered into said chamber.

"34. In chemical fire extinguishing appa-.

ratus, a chemical mixing device "adapted to discharge pressure producing chemical into a mixing tank, including a chamber containing a charge of such chemical, 'an automatically discharging .device arranged in said chamber and delivering into said mix-.

ing tank, a primary chemical receiver containing'a starting charge, a starting device' cooperating with said receiver and having its discharge end communicating withsaid chamber to discharge therein, a suction break between said suction chamber and said receiver, and means adapted to actuate said starting device and simultaneously fetard the action of said automatically discharging device until a substantially predeteri' .mined amount of said starting charge has copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

